Encounter errors when running main.lua

[wangchuan]

I have installed torch, as well as cutorch, csvigo. Then I opened terminal to execute th ./main.lua but encountered the following error:

<csv>   parsing file: data/ans.txt  
<csv>   parsing done    
/home/cwang/torch/install/bin/luajit: /home/cwang/torch/install/share/lua/5.1/torch/Tensor.lua:238: attempt to index a nil value
stack traceback:
    /home/cwang/torch/install/share/lua/5.1/torch/Tensor.lua:238: in function 'type'
    /home/cwang/torch/install/share/lua/5.1/nn/utils.lua:52: in function 'recursiveType'
    /home/cwang/torch/install/share/lua/5.1/nn/Module.lua:126: in function 'cuda'
    ./main.lua:8: in main chunk
    [C]: in function 'dofile'
    ...wang/torch/install/lib/luarocks/rocks/trepl/scm-1/bin/th:145: in main chunk
    [C]: at 0x00406670

I am using Ubuntu 14.04. Could anyone give any hint about where the error is?

[nizamsp]

I am also facing the same issue. In macbook.

<csv>   parsing file: data/ans.txt
<csv>   parsing done
/Users/nahmed/torch/install/bin/luajit: /Users/nahmed/torch/install/share/lua/5.1/torch/Tensor.lua:238: attempt to index a nil value
stack traceback:
    /Users/nahmed/torch/install/share/lua/5.1/torch/Tensor.lua:238: in function 'type'
    /Users/nahmed/torch/install/share/lua/5.1/nn/utils.lua:52: in function 'recursiveType'
    /Users/nahmed/torch/install/share/lua/5.1/nn/Module.lua:126: in function 'cuda'
    ./main.lua:8: in main chunk
    [C]: in function 'dofile'
    ...hmed/torch/install/lib/luarocks/rocks/trepl/scm-1/bin/th:145: in main chunk
    [C]: at 0x0107aaebd0
➜  captcha.irctc git:(master) ✗ vim /Users/nahmed/torch/install/share/lua/5.1/torch/Tensor.lua +238

[nizamsp]

Actually CUDA is not installed properly or the paths are not correct. I am figuring out how to make CUDA working on my machine.